Atumor,orneoplasm(literally,newgrowth),isamassofcellsthatgrowsindependentlyofthe
restofthebody.Inotherwords,itisa cancer. Various types of brain damage and disorders are described such as tumors, strokes, cerebral hemorrhage, aneurysms, cerebral ischemia, closed-head injuries, infections, toxins, and genetic factors. Epilepsy is described as a chronic brain disorder characterized by recurrent seizure activity that can be caused by brain damage, genes, or faults in inhibitory synapses.